ALSA: snd-usb-caiaq: Add support for Traktor Audio 2

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/caiaq/device.c b/sound/usb/caiaq/device.c
index 6480c32..45bc4a2 100644
--- a/sound/usb/caiaq/device.c
+++ b/sound/usb/caiaq/device.c
@@ -46,6 +46,7 @@
 			 "{Native Instruments, Audio 2 DJ},"
 			 "{Native Instruments, Audio 4 DJ},"
 			 "{Native Instruments, Audio 8 DJ},"
+			 "{Native Instruments, Traktor Audio 2},"
 			 "{Native Instruments, Session I/O},"
 			 "{Native Instruments, GuitarRig mobile}"
 			 "{Native Instruments, Traktor Kontrol X1}"
@@ -140,6 +141,11 @@
 		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =    USB_PID_TRAKTORKONTROLS4
 	},
+	{
+		.match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
+		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
+		.idProduct =    USB_PID_TRAKTORAUDIO2
+	},
 	{ /* terminator */ }
 };